NL8401273A - OF WEATHER CONDITIONS INDEPENDENT, PERMANENT SLIDE FOR SPORTS ACTIVITIES OR TEST PURPOSES AND MANUFACTURE THEREOF. - Google Patents

Description

* NL 31879 — Pf / cs * * s

Weather-independent / permanent sliding surface for sports activities or testing purposes, as well as their manufacture.

The invention relates to structures with a smooth, dense surface which, by spraying with a liquid such as for instance water, have ice-like properties. Such structures with permanent sliding surfaces which are independent of the season and the weather conditions are required both for sports activities, for example as a summer toboggan run, a summer ski jump or a slide, as well as for testing training purposes for motor vehicles. These sliding surfaces have acquired special significance for the safety training 10 in driving training.

It is known to prepare sliding surfaces provisionally. To this end, parts of streets or squares are covered with a lubricant. In addition to fine-grained solids, such as sand, for example, lubricant also served as pasty or gelatinous substances such as fats and oily or lubricating liquids. The solids proved to be unsuitable because of their insufficient adhesion to the substrate and the resulting irregular sliding values. The liquid and pasty substances caused considerable contamination of the vehicles and of the carriageways, which often could only be removed with the aid of solvents. In addition, some of the oils and fats destroyed the bitumen cover on which they were applied and were therefore not generally used. In addition, with many of these means, pollution of the groundwater is to be feared.

Therefore, attempts were made to develop permanent sliding surfaces. First of all, experience was exploited that slippery road surfaces made of blue asphalt were often the cause of accidents in rainy weather. Despite high construction costs of plastered sliding surfaces, the results were not satisfactory. On the one hand this was due to the joint material, which touched the top of the stone surface, and on the other hand to the presence of fine dust, which is always sufficiently present on normally paved pavements and forms a lubricating film with the rain.

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It is also known to produce a safety training area with a sliding surface of fine asphalt concrete with a high bitumen content, on the surface of which a bonding adhesive customary in road construction is sprayed.

A spraying surface is obtained by spraying with water, which did not exhibit the ice-like properties in terms of slip resistance. Particularly with blocking wheels, a so-called "rubbing effect" was observed, ie the wheels had displaced the water for a short time and had a grip on the road surface for some time.

The use of semi-rigid covering materials of a cellular bituminous base material filled with a plastic-containing cement mixture also failed to achieve the goal.

Traffic training areas were also built with sliding surfaces, the bituminous cover layers of which were covered with one or more plastic layers. Initially, the sliding action was very good, especially when detergents were added to the water to be sprayed thereon. Depending on the type of plastic coatings, however, some important shortcomings soon arose. The coverings of soft, elastic plastics were subject to heavy wear and therefore had to be renewed very often; those of hard, rigid plastics exhibited an innumerable number of partially continuous cracks due to the different expansion coefficients of the plastic cover and the bituminous bonded substructure.

Therefore, the challenge for sports activities or testing purposes was to develop a permanent sliding surface consisting of a hydraulically or bituminous bonded substructure and a cover, which sliding surface, when sprayed with water or aqueous solutions of known friction-reducing agents, has a behavior similar to smooth ice exhibits and excels through a long service life.

According to the invention, the task was solved by a mixture of a mixture of: 1, applied to the clean, dry surface of the substructure; 8401273 · "*" - 3 - 20-25 wt% epoxy liquid resin, 11-18 wt% special tar, 11-13 wt% hardener, and 48-61 wt% filler, 5 in two layers, an adhesive layer and a wear layer is subdivided, between which a reinforcement layer of synthetic fibers and optionally a scattering layer of fine-grained sand is applied.

The nature of the substructure depends on the available substrate and must meet the guidelines for road construction. The substructure usually consists only of a frost protection layer and a cement-bound or bituminous support layer. An additional split-rich bituminous coating with a grain size of 8/11 mm has proved particularly advantageous. A foundation is not required, but can be used.

2

The top layer with 1 to 2 kg / m tar / epoxide resin serves as the adhesive layer and the same layer with approx.

, 1 kg / m. Usually both layers have the same composition.

However, they can also deviate from each other within the given limits. Between the two layers is a fabric, braid or grid of very solid plastic, such as, for example, polyester and nylon, as a reinforcement layer. The mechanical properties of the road surface can be further enhanced by sprinkling the adhesive layer with quartz sand with a grain size of 0.1-0. Be improved by 3 mm.

As epoxide resin, a low viscosity resin, in particular a bisphenol A resin, is preferably used and a curing agent is a low viscosity, long chain polyaminoamide based on natural and dimerized fatty acids with polyalkylamines, optionally in combination with further curing agents, for example on an amine adduct basis.

Special tar types compatible with epoxide resin are used as tar components, such as are also used for the production of corrosion protection and adhesive layers for steel bridges.

As fillers, all very fine, dust-like fillers customary in road construction and their mixtures are suitable, especially a mixture of 2 parts by weight of carbon black, 6-9 parts by weight of micronized talc and 40- 50 parts by weight of quartite powder 0.01 mm.

The accompanying drawing shows, by way of example 5, the construction of the permanent sliding surface with bituminous substructure according to the invention. The frost protection layer 2 is applied to the substrate 1. This is followed by the bituminous carrier layer 3, which is covered with a bituminous cover layer 4.

In the adhesive layer 5 located thereon, a mat of special fabric is placed as a reinforcement layer 6 of polyester fibers, and quartz sand 7 is additionally sprinkled thereon. The whole is covered with a smooth wear layer 8.

The production of the permanent sliding surfaces is further elucidated in a concrete example, without any limitation of the scope of protection being derived from the sizes and mixing ratios indicated.

Example:

A 22 cm thick frost protection layer 2 is applied to the substrate 1 and compacted. In addition, in accordance with the road construction guidelines, a 5 cm thick bituminous support layer 0/32, denoted with reference number 3, and a 3 cm thick, split-containing bituminous coating 8/11, is indicated with reference number 4 in a usual manner. , applied. Care must be taken to ensure that the surface is always clean. Loose particles, oil residues, cement sludge and the like must be carefully removed before applying the adhesive layer 5, which adhesive layer consists of 1 kg / m of a tar / epoxide resin combination with the following composition: 23 23% by weight of low viscosity epoxide resin and on

* base of bisphenol-A

2 wt.% Carbon powder 6 wt.% Fillers, for example magnesium silicates 43 wt.% Filler, for example quartzite powder 35 14 wt.% Special tar 12 wt.% Hardener mixture, for example poly-aminoamide and amine additive curing agent.

The mixture is poured onto the substructure at an outside temperature of at least 15 ° C and with rubber sliders 8401273 - 5 -? Scattered. The mixture can of course also be sprayed on.

A polyester fabric 6 with a surface weight of 80 g / m is placed in the still wet adhesive layer 5 in such a way that an even coating with the mixture is achieved. The surface is sprinkled with quartz sand 7 with a grain size of 0.1-0.3 mm. 2 kg / m 2 of the same tar / epoxy resin combination as for the adhesive layer 5 is sprayed and cured over it as wear layer 8. The weather is of decisive importance for the build-up of the coatings. Dry weather is a prerequisite. The relative humidity of the air should be below 85% at an air temperature of at least 15 ° C.

As numerous experiments have shown, permanent sliding surfaces 15 can be achieved by the method described in the example, on which, by spraying with water, aqueous solutions of substances to reduce the friction coefficients and similar liquids on smooth ice-like properties can be achieved. Moreover, this road surface has proved to be insensitive to the weather conditions and resistant to wear.

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Claims (6)

Permanent sliding surface according to claim 1, characterized by a substructure, consisting of a frost protection layer, a cement-bound or bituminous support layer and a split-rich bituminous coating (4) with a grain size of 8 to 11 mm . Permanent sliding surface according to claim 1, characterized in that the adhesive layer (5) consists of 1 to 2 kg / m 2 and the wear layer (8) consists of 1-3 kg / m of the tar / epoxy resin combination. Permanent sliding surface according to claim 1, characterized by a reinforcement layer (6) of a grid or net-like fabric of very solid plastic. Permanent sliding surface according to claim 1, characterized in that as liquid epoxide resin in the mixture, a resin based on bisphenol A and as hardener a polyaminoamide of low viscosity and long chain, based on natural and dimerized fatty acids with poly-30 alkyl amines , optionally in combination with further curing agents, is used. Permanent sliding surface according to claim 1, characterized by a filler mixture of: 2 parts by weight of carbon black, 6-9 parts by weight of micronized talc and 40-50 parts by weight of quartzite powder. Method for the production of a permanent sliding surface according to claim 1, characterized in, 8401273-7 - that after the construction of the substructure in accordance with the guidelines for road construction, the relative humidity of the air does not exceed 85% and the temperature of the air of at least 15 ° C the adhesive layer (5) is applied to the dry, clean surface of the substructure, the reinforcement layer (6> is placed on top of it and thus incorporated into the adhesive layer (5) until it is completely covered by the mixture, the whole is sprinkled with quartz sand with a grain size of 0.1-0.3 mm and the wear layer (8) is sprayed over it.